package demo3;

/**
 * @Author 12629
 * @Description：
 */
class A {

}
class B extends A{

}
class C extends B{

}

class Student {

}
class Teacher {

}

class School {
    private Student[] students;
    private Teacher[] teachers;

}

public class Test {
    public static void main(String[] args) {
        String str = "hell0";
    }
}
